62 results about "Interference distribution" patented technology

The invention provides a wireless access point working channel selecting method and a wireless access point working channel selecting device. The wireless access point working channel selecting method comprises the following steps of: periodically transmitting broadcast signals outwards from an AP which is positioned in a working state; determining the interference level of an adjacent AP according to the signal strength by the AP receiving the broadcast signals; calculating the channel spacing between the working channel used by the adjacent AP and the working channel used by the AP; determining the corresponding interference degree according to the channel spacing and the preset channel spacing and an interference degree comparison table; multiplying the interference level by the interference degree to obtain the distribution information of the interference value; and selecting the working channel with the minimum interference value according to the interference distribution information. The wireless access point working channel selecting method and the wireless access point working channel selecting device can reduce the channel interference and improve the system capacity, does not need to occupy a common channel, avoids the resource waste, can be applied to the common fat AP framework and thin AP framework in the wireless local area network simultaneously, and has wide applicability.

The invention provides a heterogeneous cellular network base station deployment method based on a Poisson cluster process. The method comprises the following steps: on the basis of a random geometry theory, according to a hypothetical system model and adopting an instantaneous SINR cell selection mechanism as a cell selection mechanism of a user, deducing an SINR model based on the Poisson cluster process; carrying out analysis and inference on an interference model of a multi-layer heterogeneous cellular network by utilizing characteristics of the Poisson cluster process and a probability generation function thereof to obtain an interference distribution model; with the SINR model and the interference distribution model being combined, deducing a coverage probability model of the multi-layer heterogeneous cellular network; and carrying out simulated comparison and analysis on difference of coverage probabilities of the Poisson cluster process and a Poisson point process. The method is much closer to real communication scenes, is larger in coverage probability, can analyze coverage probability and throughput capacity better, and is of great importance in study of the heterogeneous cellular network in the future.

In a radio network a determination is made whether to implement cyclical delay diversity (CDD) for a radio frequency connection involving a radio base station (26) and a wireless terminal (30). The determination whether to implement cyclical delay diversity (CDD) is made in accordance with interference distribution at the wireless terminal (30), as such interference distribution is measured or otherwise perceived. When a determination is made to implement the cyclical delay diversity for the connection, plural transmit antennas (38) of the radio base station (26) are employed to implement the cyclical delay diversity for the connection. One or more indications of the interference distribution may be received and used to make the determination. The indication(s) of interference distribution can take the form of information received from the wireless terminal, and / or the form of frequency reuse plan information for interfering cells. For example, the determination to implement the cyclical delay diversity can be made affirmatively if the frequency reuse for interfering cells is above a predetermined frequency reuse number. In differing embodiments, either the radio base station (26) or the wireless terminal (30) can make the CDD implementation determination.

The invention provides an interference coordination method, an interference coordination device, an interference measurement method, an interference measurement device, a corresponding base station and a corresponding terminal. The interference coordination method, the interference coordination device, the interference measurement method and the interference measurement device are used for mobile communication. The interference coordination method comprises the steps that at current alternative frequency, the interference values, borne by a mobile communication network, of other signals are measured by each terminal in multiple terminals; an interference distribution information set is made; when a scheduling request of specific terminals is received and / or the scheduling operation needs to be carried out on the specific terminals, the areas where the specific terminals are located are determined according to location information of the specific terminals; at the current alternative frequency, frequency corresponding to the interference values, smaller than a preset interference threshold value, in interference values corresponding to the areas is added to a frequency set to be scheduled; part or all of the frequency is selected in the frequency set to be scheduled for the scheduling operation of the specific terminals. According to the technical scheme, the reasonable frequency can be scheduled to the terminals from a network side according to the interference condition in the areas where the terminals are located, and interference in the communication process of the terminals is lowered.

The invention relates to a high frequency radar anti-radio frequency interference method, which detects the interference signal on the radar collected far distance element accumulating Doppler spectrum by the setting signal-to-noise ratio gate and adopts different scan frequency impulse phase modulating modes to reduce the bad effect of the detecting result by the radio frequency interference distribution received by the high frequency radar.

A method for balancing the distribution of interference between radio cells in a wireless communication system including cells in which subcarrier blocks are used for communication, a number of adjacent cells building a cell cluster. A corresponding method is for use in a system using multi beam antennas or multiple antennas. Base stations perform the above method and a communication system includes the base stations. To reduce the large average SIR variations without causing additional SIR estimation, measurement and calculation problem as introduced with power control, subcarrier blocks are grouped into a plurality of subcarrier block sets in each cell of a cell cluster, to determine transmission power levels for each of the cells of the cell cluster, and to assign transmission power levels to the subcarrier block sets.

The invention belongs to the technical field of user accessing to a super-dense heterogeneous cellular network, and discloses a coverage and data plane separated super-dense heterogeneous cellular network user access method. The method comprises the following steps: building a microcellular base station system model based on a Poisson cluster process; assisting, by multiple micro base stations distributed around the same hotspot, a user in access service; building a macro base station system model based on a Poisson point process; on the premise that a macro base station is mainly used for completing a coverage function and the micro base stations are used for high-rate data transmission, respectively deducting an SINR (Signal to Interference plus Noise Ratio) distribution model and an interference distribution model which are received by a macro base station user and a micro base station user; deducting an average accessible rate when users in a network are served by different types of base stations by using the SINR distribution model and a known distance distribution model; and deducting a reliable closed upper bound and lower bound of Laplace transformation of the interferencedistribution model. A data simulation result shows that the coverage and data plane separated super-dense heterogeneous cellular network user access method provided by the invention can achieve a higher data rate.

The invention discloses a resource allocation method for an uplink channel of a smart power grid based on an NB-IoT protocol. The method comprises the following steps: 1, sampling data to be monitoredby different types of sensors in the smart power grid; 2, encoding the sampled data according to the sensor numbers and sampling times; 3, performing channel diversity processing on the coded data according to burst interference distribution detected in the detection link; and 4, according to the total resource size and the channel diversity frequency of the wireless system, allocating an optimaltransmission scheme to each data, and transmitting the data to an NB-IoT wireless private network base station more effectively. According to the invention, frequency spectrum resources can be betterutilized, so that the throughput rate and the anti-interference capability of a wireless transmission system are improved, and reasonable resource allocation is achieved.

Methods and apparatuses for indicating an interference distribution in frame between base stations are provided. The method comprises: in response to a mismatch between a first frame allocation used by a first base station and a second frame allocation used by a second base station, transmitting, from the first base station to the second base station, a message for indicating an interference distribution in frame, A new information element, i.e., UL ABS (uplink Almost Blank Subframe) is introduced to indicate the uplink ABS information of the interfering base station. A modified DL ABS with a flag is used to indicate the downlink ABS information of the interfering base station, wherein the flag is to indicate that the DL ABS is used to protect UL transmission in the recipient base station.

The invention provides a self-adaptive disturbing signal processing recognition device of a wide-domain all-fibre disturbance sensor network system, which is mainly used for the pipeline monitoring of safety detection and monitoring, etc. of pipelines delivering various risky or high-value chemical products. Based on an all-fibre reflection interference distribution type sensor circuit system, a method which adopts wavelet denoising and ICA signal separation and characteristic extraction is provided, with the realization process of two contents: on the one hand, in a data signal register, mixed signals carried with various noises and disturbance information are read out, the signal pre-processing and separation thereof are carried out, the characteristic value is then extracted, a KNN recognition module is entered finally, and the type and property of the input signal are recognized; on the other hand, when the signals to be recognized are processed and recognized, the signals are input into a recognized signal register, after the recognized result analysis of the signals to be input is completed, a main controller decides whether to carry out the manpower interception to the input signals so as to determine the type and property of the input signals further.

The invention discloses an interference management strategy under a cognitive dual-layer heterogeneous network system, particularly discloses a cell regionalization interference management strategy in a cognitive heterogeneous network, and relates to the technical field of wireless communication interference management. The interference management strategy is characterized in that a macro-cell user (MU) in a cell covered by a dual-layer heterogeneous network is taken as a main user, a femto-cell user (FU) is taken as a secondary user, the interference of the FU changes correspondingly on the basis of the change of the position where the MU is positioned, an area where the MU is positioned is judged through channel information, and interference alignment is performed on the interference of the FU and the interference of the MU respectively according to different characteristics of interference distribution in different areas, thereby lowering interference to the FU and the MU. The inference alignment is realized through pre-coding design of each transmitting end of the FU and the MU. A higher rate is provided for a next-generation wireless cellular network. Particularly, under the condition of rare frequency band resources, a solid physical foundation is laid for the utilization of idle frequency band resources, appropriate access to idle frequency bands and increase in the frequency utilization ratio.

The invention provides a generation method of a detection threshold of a moving target. The generation method comprises the steps: to-be-detected signals of a plurality of Doppler channels are generated through pulse information collected within the coherent processing time and obtained from a pulse Doppler radar; the to-be-detected signals are subjected to cell average constant false alarm rate processing to generate the detection threshold under an average background; according to obtained radar system static clutter characteristics, a ground clutter minor lobe threshold is calculated; an interference reference threshold of pulse interference information in the to-be-detected signals to the distance Doppler domain is calculated; and the pulse information is detected through the detectionthreshold, the ground clutter minor lobe threshold and the interference reference threshold, and a two-value detection result is obtained. On the basis of a cell average constant false alarm rate method, the false alarm rate caused by clutter and interference during detection is decreased by combining static clutter distribution and interference distribution of current data with generation of thecoherent characteristic optimized detection threshold of a radar system.

The interference allocation of the crane steel cable comprises the main beam, active pulley set, static pulley set, rolling machine, featuring in the guide pulley at the top space, cover at both ends having roll bracket with different heights, linking line of both ends of the main beam roller barrel vertical central line with the center line of the guide pulley forming the same small deviation angle with the center line of the main beam, consistent in deviation angle of the each rolling machine at the same end, with the main beam both ends opposite in deviation angle with the main beam. The interference distribution is simple, convenient, efficient, safe, and reliable.

The invention provides a network user access method based on a Neyman-Scott cluster process. The method comprises the following steps of 1), establishing a system model based on the Neyman-Scott cluster process; 2), deriving a distance distribution model between users and different base stations in clusters; 3), deriving an SINR distribution model and an interference distribution model; 4), deriving an average reachable rate when the users are served by certain base station, through utilization of the SINR distribution model and the interference distribution model; 5), analyzing the interference distribution model of an ultra dense network; 6), obtaining a final average reachable rate when the users are served by a plurality of base stations at the same time, through utilization of the result; and 7), showing that the average reachable rate of the users can be improved through utilization of the method, according to comparison. Compared with a Poisson point process, the method has theadvantages that the method is closer to a practical ultra dense network environment, a higher network average reachable rate is obtained, and the method is significant to the future practical deployment of the ultra dense network.

The present invention discloses an anti-interference distribution box. The anti-interference distribution box comprises a box body and a box door, a wire mesh cover is disposed inside the box body, a plurality of electrical elements are disposed on a rear wall inside the box body, an electrical element support is disposed inside the wire mesh cover, both left and right sides of the box body are provided with window-shades, inset proof nets are disposed at the window-shades inside the box body, the box door is disposed at the left side of the box body and is internally provided with an interlayer, the interlayer is internally provided with heating devices and also a heat conduction liquid, the heating devices are connected with power supply boxes through wires, the power supply boxes are internally equipped with power supplies and are connected with temperature control switches through wires, and the temperature control switches are disposed at the right side of the box door. The anti-interference distribution box is simple in structure, convenient to use, strong in anti-interference capacity, excellent in insect proof effect, and capable of preventing frost cracks.

The invention relates to a sliding mode observer real-time modeling method for fault diagnosis of an electric power steering system. The method is used for fault diagnosis of the electric power steering system with interference. A sliding mode fault diagnosis method is applied to a power-assisted steering system with interference; meanwhile, aiming at the defect that disturbance existing in a common sliding mode fault algorithm is obtained through the algorithm or experience estimation, the innovation of an electric power steering system device is provided, so that the detection of interference existing in the system is realized, the interference vector is obtained, a more accurate interference distribution matrix can be obtained according to the interference vector, and the accuracy of afault algorithm is improved. According to the present invention, the disturbance existing in the system is measured in real time by using the torque sensor and the angle sensor, and the real-time interference distribution matrix is derived, so that the fault diagnosis and reconstruction of the electric power steering system with the disturbance are ensured. According to the method, the fault diagnosis correctness and the accuracy of the electric power system with interference and disturbance are ensured.

Based on distribution information of interference signal in signal sequence, the invention sets up sequence of weight value. Weighting process is carried out for signal sequence or sequence of local code to calculate relevant result. The normalization process is carried out for the said relevant result. The method takes full advantage of information of interference signal in signal sequence and sets up weighting value smartly so as to reach purpose of lowering received interference. Features of the method are simple and easy of implementation.

The invention relates to a vortex light mode detection method based on a three-step phase shift method. Vortex light is a special light field with a spiral wave front, and the three-step phase shift method is a phase measurement method. The method comprises the steps of firstly, preparing a hologram of target vortex light; superposing three beams of one-dimensional gratings with phase shifts of 0,0.5 pi and pi on the basis to obtain three new holograms; sequentially recording the intensity distribution of the initial vortex light and the interference distribution of the three beams of phase shift vortex light on the same plane through a spatial light modulator method, and obtaining the complex amplitude distribution of the vortex light in combination with a phase formula; and secondly, carrying out convolution operation on the complex amplitude distribution and standard vortex light bases with different topological charges through a computer to acquire the mode degree and the mode purity of the target vortex light and achieve mode analysis of the target vortex light. The method provided by the invention is simple in optical path and high in flexibility, belongs to the field of vortex light detection, and can be applied to mode detection of complex vortex light.

The invention discloses a method for testing space-frequency block codes, which comprises: calculation in caussian approximation is performed to the interference distribution of received signal variable to obtain the initial probability, the typical values and the variances of sent symbols; the initial probability of the send symbols is updated, and the probability of the sent symbols is obtained; the maximum likehood ratio of the sent symbols is obtained according to the probability of the sent symbols; and the sent symbols is tested according to the maximum likehood ratio of the sent symbols. The invention also provides a space-frequency block code testing device to reduce the error floor in ultra-wideband channel, so that the system performance is improved.

According to an aspect, there is provided a method comprising: determining, by a terminal device of a wireless communication system, one or more distribution measures, wherein distribution comprises one or more of a signal distribution, an interference distribution, mutual information distribution, block error probability distribution or a signal-to-noise-and-interference ratio distribution; producing, by the terminal device, a measurement report that comprises the one or more distribution measures; and transmitting, by the terminal device, the measurement report to an access node of the wireless communication system.

The invention provides a self-adaptive disturbing signal processing recognition device of a wide-domain all-fibre disturbance sensor network system, which is mainly used for the pipeline monitoring of safety detection and monitoring, etc. of pipelines delivering various risky or high-value chemical products. Based on an all-fibre reflection interference distribution type sensor circuit system, a method which adopts wavelet denoising and ICA signal separation and characteristic extraction is provided, with the realization process of two contents: on the one hand, in a data signal register, mixed signals carried with various noises and disturbance information are read out, the signal pre-processing and separation thereof are carried out, the characteristic value is then extracted, a KNN recognition module is entered finally, and the type and property of the input signal are recognized; on the other hand, when the signals to be recognized are processed and recognized, the signals are input into a recognized signal register, after the recognized result analysis of the signals to be input is completed, a main controller decides whether to carry out the manpower interception to the input signals so as to determine the type and property of the input signals further.

The invention discloses a method for resisting an attack deep neural network based on a frequency band, and the method comprises the steps: firstly obtaining a frequency band space which comprises theanti-interference of frequency band pairs in N directions, wherein the anti-interference of frequency band pairs in each direction comprises the anti-interference distribution of frequency band pairswith M wavelengths, the anti-interference distribution of each frequency band pair is a waveform containing alternating activation and inhibition, and gradient signals are filled between wave crestsand wave troughs of each frequency band pair; respectively adding the frequency band pair anti-interference distribution and the original image to obtain an anti-attack sample, inputting the anti-attack sample into the attacked deep neural network, taking the anti-attack sample corresponding to the minimum value of the prediction result score as an optimal anti-attack sample, and attacking the attacked deep neural network. According to the method, the waveform containing alternate activation and suppression is adopted as anti-interference distribution, so the sensitivity of the network to an anti-attack sample is effectively improved, the anti-attack sample can be easily measured by the deep neural network, the original signals are confused, and the deep neural network is enabled to predict an error result.

The invention relates to a touch screen power supply interference identification processing method. Firstly, a touch screen is powered on, and node data of all channels of the touch screen are scannedand measured; analyzing, processing and converting the node data of each channel; dynamically detecting node difference data of which the full screen of the touch screen is greater than a power supply interference threshold value; the invention discloses a power interference identification mode time threshold. When the absolute value of the difference value between the channel node difference value data and the previous time node difference value data is smaller than a power supply interference identification threshold value, power supply interference identification processing is not carriedout on the touch screen; entering a power supply interference identification mode when the absolute value of the difference between the channel node difference data and the previous time node difference data is greater than a power supply interference identification threshold value; and performing power supply interference identification processing on the touch screen, establishing a power supplyinterference distribution form data model by taking time as an axis according to the channel node data, and setting a power supply interference level according to the power supply interference distribution form data model.